Calcispongea from the Jurassic of Poland
Helena Hurcewicz
Acta Palaeontologica Polonica 20 (2), 1975: 223-291
Thirty seven species of Calcispongea are described from the Middle and Upper Jurassic of Poland; 35 of them represent the order Pharetronida Zittel and the remaining two - the order Thalamida Laubenfels. The analyses performed involved microstructure and spicular composition in parenchymal and cortical skeletons, external morphology, and structure of water system.
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